24V 14" Coil Clean UVC Purifier 12 month lamp. Simple to install unit just use the magnet to attach it to the inside of your ductwork OR drill a hole in your supply or return plenum, insert the unit, mount the power pack to the ductwork using the attached magnet and wire it to any 24 VAC power supply. This unit is designed to run 24/7. The UV lamp needs to be replaced every 24 months like most other UV systems. The model 2414 is designed to remove pathogens.